How Hot Is Too Hot?

“What is the hottest ‘room’ temperature at which a human body can, by sweating, keep itself cool enough to avoid health damage?” — Matt B., Etterzhausen, Germany It’s not the heat, it’s the humidity. Your body avoids overheating by taking advantage of a bit of physics: When water evaporates from a surface, it leaves the…

Summer Recreation? It’s Backordered

In January, the Outdoor Foundation, the nonprofit arm of the Outdoor Industry Association, shared some gloomy statistics. According to its annual survey, fewer than 20 percent of Americans were recreating outside at least once a week, working out to an estimated billion fewer outdoor activities a year compared to a decade earlier. Just under half…